Improvement in substitute for jam-nuts



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Letters Patent No. 102,644, 'dated May 3, 187,0.

IMPROVEMNT IN SUBSTITUTE FOR JAM-NUTS..

The Schedule referred to in these Letters Patent and making part of theSame I, THEoDonE B. YOUNG, of the city of Louisville, county of'Jefferson and State of Kentucky, have invented a certain new and Ausefuldevice as a Substitute for a Jam-Vut on Screw-bolt, of which thefollowing is a speciiication.

The nature of my invention consists in a small steel pin inserted inthecoruer ofthe nut, so as to turn easily, thehead of which is madeeccentric, or in the form of a scroll, with teeth eut in` the edge, andplaced so'near the bolt that, by turning it slightly, the teeth catchesthe thread, and any attempt to turn or uns-,crew the nut only causes theteeth to sink deeper into the thread, and thereby prevents it fromturning. v

To enable others to make and use my invention, I will proceed todescribe it more fully liv reference to the drawings, iriwhieh- Figure 1is a perspective view of the bolt and nut.

'Figure 2 is a view of' the steel pin, showing the shape of the head.

A is the block through which the bolt passes.

B is the nut of the bolt.

D is the screw of the saine.

C is a steel pin secured in the corner ofthe nut,

- near the thread-of the bolt, but so as to turn easily,

the headoi which pin is made eccentric, with teeth cnt in the edge andcountersunk in the top oi the'nut, so as to be out of the Way.

Having thus fully described the construction ot my invent-ion, itsoperation is 4simply that of screw-ing up the nut'B to ,its properplace, after which turn the pin C until the teeth Catch the thread ofthe bolt D,

and any attempt to turn or -uuscrew the nut only forces Witnesses E. F.Huron, GEORGE Knien, Jr.

